Blue sapphire – a gemstone from Sri Lanka

Blue Sapphire – A Classic Gemstone
Blue sapphire is the best-known and most sought-after variety of corundum (Al₂O₃). It is prized for its deep blue color, which can range from light blue shades to deep, velvety dark blue. Sapphire has a hardness of 9 on the Mohs scale, making it exceptionally resistant to grinding and long-term use.

Sri Lanka – a world-famous source of sapphires
Sri Lanka, also known as “Ceylon”, is one of the most important sources of blue sapphires. The stones here stand out for their subtle but intense shade of blue, often referred to as “Ceylon blue”. These sapphires are among the most prized on world markets and are sought after by collectors and jewelers.

History and uses of blue sapphire
Blue sapphires have adorned royal and crown jewels for centuries. In Asia and Europe, they were a symbol of nobility, purity and strength. Sapphires from Sri Lanka have earned a reputation for their beauty as some of the finest in the world.

Identifying Blue Sapphire

Chemical Formula: Al₂O₃

Color: Light to dark blue

Crystal Appearance: Prismatic, hexagonal

Crystal System: Hexagonal

Hardness: 9 (Mohs scale)

Luster: Vitreous

Cleavage: None

Scratch: White

Density: 3.9 – 4.1 g/cm³